Acacia retinodes - Mimosa d'été

Habitat

Exposition

Plein soleil

Vent

Tolère un peu de vent

Humidité

Sol sec à moyen. Tolère la sécheresse.

Sol

Sol léger à moyen. Nécessite un sol drainant.

pH

Sol acide ou calcaire

Rusticité

Zone 8

Habitat originel

Inconnu

Origine géographique

Australia - Victoria, New South Wales, Tasmania. Locally naturalized in S. Europe[50].

Comestibilité

• Flowers - cooked [144].
• Rich in pollen, they are often used in fritters .
• Graines [144, 157].
• Pas plus de détails ne sont précisés .
• The seedpods can be up to 18cm long [219].
• Acacia seeds are highly nutritious and contain approx 26% protein, 26% available carbohydrate, 32% fibre and 9% fat [278].
• The fat content is higher than most legumes with the aril providing the bulk of fatty acids present [278].
• These fatty acids are largely unsaturated which is a distinct health advantage although it presents storage problems as such fats readily oxidise [278].
• The mean total carbohydrate content of 55.8 + 13.7% is lower than that of lentils, but higher than that of soybeans while the mean fibre content of 32.3 + 14.3% is higher than that of other legumes such as lentils with a level of 11.7% [278].
• The energy content is high in all species tested, averaging 1480+270 kJ per 100g [278].
• Wattle seeds are low glycaemic index foods .
• The starch is digested and absorbed very slowly, producing a small, but sustained rise in blood glucose and so delaying the onset of exhaustion in prolonged exercise [278].

Autres usages

• A yellow dye is obtained from the flowers [168].
• A green dye is obtained from the seed pods [168].
• The extensive root system of this plant helps to prevent soil erosion [200].

Culture

• Prefers a well-drained sandy loam and a very sunny position[1, 260], but it also stands drought and wet well [260].
• Succeeds in any good garden soil, this species is said to be fairly lime tolerant [11, 166, 182, 200].
• Succeeds in a hot dry position [166].
• Plants are fairly tolerant of salt in the soil and salt-laden winds [260].
• This species is said to be hardy from mid-Sussex southwards and westwards [1].
• However, trees are not very hardy outdoors in most parts of Britain and even in the mildest areas of the country they are likely to be killed in excessively harsh winters [11].
• A very ornamental tree [1].
• Ces plantes ont une relation symbiotique avec des bactéries du sol qui forment des nodules sur les racines et fixent l'azote atmosphérique .
• Une partie de cet azote est utilisé par la plante mais une partie est disponible aux autres plantes poussant à proximité [200].

Propagation

• Seed - best sown as soon as it is ripe in a sunny position in a warm greenhouse [1].
• Stored seed should be scarified, pre-soaked for 12 hours in warm water and then sown in a warm greenhouse in March .
• The seed germinates in 3 - 4 weeks at 25°c [133].
• As soon as the seedlings are large enough to handle, prick them out into individual pots and grow them on in a sunny position in the greenhouse for their first winter .
• Plant them out in late spring or early summer, after the last expected frosts, and consider giving them some protection from the cold for their first winter outdoors .
• Cuttings of half-ripe wood with a heel, July/August in individual pots in a frame [78].
• Overwinter in a greenhouse for the first winter and plant out in their permanent positions in late spring or early summer .
• Fair percentage [78].